Coffee-mill.



B. G. HULWICKL COFFEE MILL.

APPLICATION FILED AUG.17, 1907.

Patented July 13, 1909.

\\ L alum r mum I I wihwoaeo BRAMWELL C. HOLWICK, OF CANTON, OHIO.

COFFEE-MILL.

Specification of Letters Patent.

Patented July 13, 1909.

Application filed August17, 1907. Serial No, aaaoss.

To all whom it may concern:

lle it known that I, lmaMwnLL (1. Ho].- wu'u, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Coffee-Mills; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, making a part of this specification, and to the numerals of reference marked thereon, in which- Figure l is a vertical. section of the mill showing the difi'erent parts placed in proper position. Fig. 2 is a transverse view of the shaft showing the motor connected thereto and the jet nozzle placed in position with reference to the motor. Fig. 3 is a sectional view of the rotary grinding disk. Fig. 4C is a. face View of the rotary grinding disk. Fig. 5 is a detached View of the detachable head. Fig. (5 is a detached View of one of the buckets.

The present invention has relation to coffee mills and it consists in the novel arrangement hereinafter described and particularly pointed out in the claim.

Similar numerals of reference indicate corresponding parts in all the figures of the drawing.

In the accompanying drawing, 1 represents the base or support, which base or so port is formed hollow and of a size su cient to form a casing for the motor 2, which motor is securely attached to the shaft 3, said shaft being journaled in the bearings 4 and 4, said bearings being located upon opposite sides of the base or casing 1 as illustrated in Fig. 1.

To one end of the shaft 3 is attached the grinding disk 5, which grinding disk may be of any desired kind. The outer end of the bearing 4: is provided with the flange (l, which flange incloses the grinding disk 5 and at the same time provides a means for attaching the head 7 to which head is attached the grinding disk 8, said grinding disk 8 being provided with an opening 9, which opening registers with the passage 10 formed in the head 7 The head 7 is detachably connected to the flange'G by means of the screws 11. It will be understood that by detachably connecting the head 7 to the flange 6, said head together with the disk can be removed for any cause without disturbing any part of the structure, except that carried by the head.

The bearing 4 is screw threaded and upon which screw threaded bearing is located the screw or cap 12, which cap is provided with the washer 13, which washer is adapted to abut against the end of the shaft 3 as illustratedin Fig. 1. It will be understood that by turning the cap 12 in the direction to move it upon the bearing 4 it will move the shaft 3 endwise after the washer 13 comes in contact with the end of the shaft 3, and as the shaft 3 is moved endwise it will carry the grinding disk 5 toward the grinding disk 8, by which arrangement the space between the disks is adjusted and provision made for grinding coarse or fine as desired. For the purpose of moving the shaft 3 endwise when released by the cap 12 the spring 14 is pro vided the ends of which spring abut against the hub of the motor 2, and the inner face of the base or casing l as best illustrated in Fi 1.

I t will be understood that the chamber in which the motor is located should be formed of a width somewhat greater than the width of the motor so that the motor can move back and forth when the shaft is moved to adjust the grinding disk 5.

To the periphery of the motor 2 are attached a series of buckets 15, which are substantially of the form shown. The jet nozzle 16 is located substantially as shown in Fig. 2, and as shown it will throw a stream of water against the buckets, which buckets are preferably formed cup shaped as best illustrated in Fig. 6, and the buckets located at such an an le that the greatest force of the stream 0 water will be utilized in rotating the motor Wheel 2.

It will of course be understood that a supply pipe 17 must be provided and the usual cut off valve 18 properly located, but this feature forms no particular part of the present invention.

By locating the motor and the grinding disk upon a sin le shaft and at the same time providing fbr end adjustment of said shaft I am enabled to drive the grinding disk direct, thereby doing away with gear and reducing the expense in the manufacture of the mill. It will also be understood that by connecting the stationary grinding disk to the head 7 and detachably connecting the head to the main portion of the mill, the

stationary grindin grinding disks are of easy access, owin to' the fact that all that is necessary to be one is to remove the head, which removes the disk and carries access to the rotary grin ing disk.

It will be understood that a hopper 19 should be provided, which hopper is of ordinary construction and has no specific reference to the present invention.

For the purpose of reduein friction and noise the washer 13 is preferably formed of non-metallic material of any suitable kind. It will be understood that by formin the washer of non-metallic material, a slig t resiliency is provided for as between the cap 12 and the end of the shaft 3, by which arrangement there is no metal contact as between the ca and the shaft. For the purpose of drawing the water used in propelling the motor a waste pipe such as 20 should be provided.

For the purpose of preventing the accumulation of coffee in the grinding chamber after it has been properly ground, the rotary grinding disk 5 isprovided with the blade 21, which blade is so located that it will sweep the ground coffee that does not fall by gravity into a position to pass through the opening 22 formed at the bottom of the grindin chamber.

For t e purpose of preventin any variation in the adjustment of the s aft 3 after said shaft has been properly adjusted so as to bring the grindin disks 1n proper spaced relationship with re erence to each other, the cap 12 is provided with the set-screw 23,

which set-screw is for the purpose of preventing any rotation of the cap, except at such times .as it is found necessary to adjust the shaft, 3.

Havin fully described my invention,

what I c aim as new and desire to secure by Letters Patent, is-

In a coffee mill, a motor casing, a motor shaft carried by the motor casing, and slidably mounted in its bearin s, one of' the bearin s of said shaftexten ed beyond the face 0 the motor casin and provided with a screw-threaded perip ery, a cap adjustabl attached to'said bearin and provided witi a washer ada ted to a ut a ainst the end of the shaft an means for ho ding said cap against rotation upon the shaft bearing, a grinding disk rotatable with the shaft a chamber adapted to inclose said inding disk a sweepln blade rojecting rom the edge of said isk, a xed grinding disk located adjacent the rotatable disk, a motor wheel located upon the slidable shaft and a spring located between one face of the motor casing and the adjacent face of the motor wheel, said motor wheel formed ofia width less than the width of the motor casing, substantially as and for the purpose specified.

In testimony that I claim the above, I have hereunto subscribed my name in the presence of two witnesses.

I BRAMWE'LL c. HOLWICK. 

